1 1985 K100rs Misfire @ idle & cyl "drop out" SOLVED Thu Nov 29, 2012 1:36 am
ibjman
Life time member
As a recap: 1985 K100rs (2V) Generally ran well..... Some dificulty starting.....drops a cylinder or 2 every now & again at slow idle, seems ok above 1200 rpm. Also causes it to buck & stall if cylinder drop out happens to occur while engaging the clutch.
Troubleshooting section found elsewhere in these forums (excellant) shows an Ignition coil seconday resistance of approx
12.6K Ohms. The coil in the photo appears to be somewhat different than the ones I have.
Tested Mine 1-4 = 17.2K, 2-3 = 10.2K
Tested spares on a "parts" bike. 1-4 = 17.2K, 2-3 = infinity/open (assumed defective)
Installed the 1-4 coil off the parts bike to replace the low impedence 2-3 on the runner.
Now starts & runs normally. Also picked up about 300 rpm at hot idle.
Conclusion, proper secondary resistance value for this model is closer to 17K ohms that the 12.6 shown in the trouble shooter. Primary resistance checked about 3.4 on all 4 of mine.
Troubleshooting section found elsewhere in these forums (excellant) shows an Ignition coil seconday resistance of approx
12.6K Ohms. The coil in the photo appears to be somewhat different than the ones I have.
Tested Mine 1-4 = 17.2K, 2-3 = 10.2K
Tested spares on a "parts" bike. 1-4 = 17.2K, 2-3 = infinity/open (assumed defective)
Installed the 1-4 coil off the parts bike to replace the low impedence 2-3 on the runner.
Now starts & runs normally. Also picked up about 300 rpm at hot idle.
Conclusion, proper secondary resistance value for this model is closer to 17K ohms that the 12.6 shown in the trouble shooter. Primary resistance checked about 3.4 on all 4 of mine.